EP0788823B1 - Filtering insert for a liquid filter - Google Patents
Filtering insert for a liquid filter Download PDFInfo
- Publication number
- EP0788823B1 EP0788823B1 EP97101304A EP97101304A EP0788823B1 EP 0788823 B1 EP0788823 B1 EP 0788823B1 EP 97101304 A EP97101304 A EP 97101304A EP 97101304 A EP97101304 A EP 97101304A EP 0788823 B1 EP0788823 B1 EP 0788823B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner part
- filter
- filter insert
- outer ring
- insert according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007788 liquid Substances 0.000 title claims description 8
- 238000001914 filtration Methods 0.000 title 1
- 239000004033 plastic Substances 0.000 claims description 26
- 229920003023 plastic Polymers 0.000 claims description 26
- 239000000446 fuel Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 241000237519 Bivalvia Species 0.000 claims 1
- 235000020639 clam Nutrition 0.000 claims 1
- 239000012768 molten material Substances 0.000 claims 1
- 239000012815 thermoplastic material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/111—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
- B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/34—Seals or gaskets for filtering elements
Definitions
- the invention is based on a filter insert for Liquid filter according to the preamble of claim 1 specified genus.
- the known filter insert has the Disadvantage that in the manufacture of plastic existing end plates for soaking the filter paper existing star element by means of a heating device must be melted. When melting such Plastics that are resistant to fuel is due to their high melting point correspondingly high energy consumption necessary, which one stands in the way of inexpensive production.
- DE 44 16 577 A1 is a similar one Filter insert known in which a star filter element is arranged between two plastic end plates, the open end plate for a different type of connection is executed.
- the open end plate points here as Connection means one lying in the central passage Sealing ring on, so that a separate for this type Injection mold is required.
- DE 4222136 A1 shows a liquid filter with a filter element with a double conical plug 26.
- the double conical plug 26 is a spring element 24 into a conical transition region 17 provided in the cover 13 of the housing 11 pushed.
- EP 0773052 A1 discloses a ring filter element in which the filter element 11 seals is arranged between end plates 12, 13 made of plastic, the one End plate 12 is closed.
- the filter insert according to the invention with the characteristic Features of claim 1 has the advantage that it is the largest possible with the same basic design Variety of variants allows, while also simple and is inexpensive to manufacture.
- the additional inner parts are universally applicable, easy to manufacture and inexpensive to fix.
- the filter insert can be in manufacture in an energy-saving manner by sinking the Filter element when casting the end plates from plastic is made before the plastic solidifies and a creates a tight and firm connection. The height Energy expenditure for re-melting one fuel-resistant plastic can thus be dispensed with.
- FIG. 1 shows a longitudinal section through a first embodiment of a filter insert for a Fuel filter and Figure 2 shows a longitudinal section through a Part of a second embodiment.
- FIG. 1 shows a longitudinal section through a Filter insert 10 for a liquid filter in a simplified Representation of how it is used with fuel filters.
- the filter insert 10 has a hollow cylindrical design Filter element 11, which consists of a star-folded There is filter paper and its zigzag shape Edges in end plates 12, 13 made of plastic are tightly attached.
- the lower end plate 12 is closed and designed as a flat, circular plate, while the upper end plate 13 by a central Passage 14 is open.
- the star-shaped Filter element 11 is thus for a radial flow provided, this usually from the inside out happens.
- the star-shaped edges on the End faces of the filter element 11 are made of plastic existing end plates 12, 13 cast. this will realized in that the liquid plastic material in a form is dosed and usually attached to it then the paper filter element 11 into the not yet solidified material is pressed. After curing the Plastic becomes a tight and tight connection between End plates 12, 13 and filter element 11 reached.
- the open end plate is 13 constructed in two parts and consists of one with the Filter element 11 connected outer ring 15 and one Inner part 16, in which in addition to the central passage 14 Connection means 17 are arranged, here as an O-ring 18th are trained.
- the inner part 16 is essentially rotationally symmetrical and has a Passage 14 receiving hub 19, on its outer circumference radially extending ring flange 21 in one piece is molded.
- the inner part 16 has one inside of the filter insert 10 projecting hub part 22 in one Center bore 23 of the outer ring 15.
- the outer diameter of the ring flange 21 is much larger than the inner diameter of the guide bore 23; further the ring flange 21 and the outer ring 15 each have one rectangular cross-section on whose long sides lie next to each other, so that a relatively large, overlapping contact surface 24.
- This Contact surface 24 is now a welded joint 25 executed so that the outer ring 15 with the inner part 16th is tightly and firmly connected.
- the weld joint 25 is advantageous by ultrasonic welding or by Friction welding can be produced.
- the inner part 16 also has a outwardly projecting hub part 26, on the outer circumference in an annular groove 27 of the sealing ring 18 is arranged.
- the inner part 16 is simple, stable and inexpensive constructed and can be made of the same plastic be like the outer ring 15 plastic resistant to fuel, such as Example use polyamide.
- In the manufacture of the filter insert 10 can be done so that first Basic element 28 is built and then that Inner part 16 is welded to the outer ring 15.
- Filter insert 10 produced is not in a closer shown filter housing installed, the O-ring 18 in in a manner known per se the seal between the dirt and the clean side inside the filter housing takes over.
- FIG 2 shows a longitudinal section through part of a second filter insert 30, which differs from the first Filter insert 10 according to Figure 1 differs as follows, wherein Identical components with the same reference numerals are.
- the second filter insert 30 has the same Base element 28, at its open end plate 13 other inner part 31 is welded.
- For the inner part 31 is a threaded nut 32 in the central passage 14 Metal used, which serves as connection means 17 here.
- the Inner part 31 can be made in the same way as in the first Secure filter insert 10 to outer ring 15 by welding.
- the second filter insert 30 is in a manner known per se installed in a filter housing, not shown, a fuel line in the threaded nut 32 can be screwed in. This way you can without Change the basic element 28 a different type of connection realize so that with the least possible effort greatest possible variety is feasible.
- connection means in the form of a ring seal or threaded nut for screw connection
- connection means in the form of a ring seal or threaded nut for screw connection
- the two parts of the open end plate manufacture the same plastic and use a Secure the welded connection tightly and tightly together it may also be useful to have these two parts in the Touch surface 24 to glue together.
- the inner parts made of thermoplastic Producing plastic and inserting it into an injection mold, into which a thermoplastic melt for the Outer ring 15 is freely extruded.
- the inner part in the area of the contact surface 24 from the extruded Melted melt. Furthermore, this is in this melt paper filter element immersed on the face. After this The open end plate 13 can solidify from the melt Injection mold are lifted, the filter element is sealed at the end and the two parts of the End plate are tightly and firmly connected.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung geht aus von einem Filtereinsatz für ein Flüssigkeitsfilter nach der im Oberbegriff des Anspruchs 1 näher angegebenen Gattung.The invention is based on a filter insert for Liquid filter according to the preamble of claim 1 specified genus.
Es ist schon ein solcher Filtereinsatz für Kraftstoff-Filter aus der DE 35 14 778 C1 bekannt, bei dem das sternförmig ausgeführte Filterelement zwischen zwei stirnseitig angeordneten Endscheiben aus Kunststoff dicht und fest angeordnet ist. Während die eine Endscheibe geschlossen ausgeführt ist, baut die andere Endscheibe offen und weist dazu in einem mittigen Anschlußstutzen einen zentralen Durchgang auf, in dem zugleich zur Befestigung einer Kraftstoffleitung eine Gewindemutter aus Metall eingesetzt ist. Die offene Endscheibe hat auf diese Weise Anschlußmittel, die hier als Gewindestutzen ausgeführt sind. Ferner ragen in das Innere des Filtereinsatzes Stützrohre, welche aus Kunststoff bestehen und einstückig mit den Endscheiben ausgeführt sind. Die Endscheiben werden hier im Kunststoff-Spritzgießverfahren hergestellt, so daß bei unterschiedlichen Anschlußarten jeweils gesonderte Spritzwerkzeuge notwendig sind, was erheblichen Kosten- und Fertigungsaufwand erfordert. Zur Befestigung des Filtereinsatzes im eigentlichen Filtergehäuse sind je nach Ausführung des Filters verschiedenartige Anschlüsse notwendig. Ferner hat der vorbekannte Filtereinsatz den Nachteil, daß bei dessen Herstellung die aus Kunststoff bestehenden Endscheiben zum Einsumpfen des aus Filterpapier bestehenden Sternelements mittels einer Heizeinrichtung aufgeschmolzen werden müssen. Beim Aufschmelzen solcher Kunststoffe, die gegen Kraftstoff widerstandsfähig sein müssen, wird bedingt durch deren hohen Schmelzpunkt ein entsprechend hoher Energieaufwand notwendig, was einer kostengünstigen Herstellung entgegensteht.It is such a filter insert for fuel filters known from DE 35 14 778 C1, in which the star executed filter element between two ends arranged plastic end plates tight and firm is arranged. While one end plate is closed is executed, the other end plate is open and points in addition a central one in a central connecting piece Passage in which at the same time to attach a A metal threaded nut is used in the fuel line is. The open end plate has in this way Connection means, which are designed here as threaded connectors. Support tubes also protrude into the interior of the filter insert, which are made of plastic and are integral with the End plates are executed. The end plates are here in the Plastic injection molding process, so that at different connection types each separate Injection molds are necessary, which is considerable cost and Manufacturing effort required. To attach the Filter insert in the actual filter housing depend on Design of the filter different types of connections necessary. Furthermore, the known filter insert has the Disadvantage that in the manufacture of plastic existing end plates for soaking the filter paper existing star element by means of a heating device must be melted. When melting such Plastics that are resistant to fuel is due to their high melting point correspondingly high energy consumption necessary, which one stands in the way of inexpensive production.
Ferner ist aus der DE 44 16 577 A1 ein ähnlicher Filtereinsatz bekannt, bei dem ein Sternfilterelement zwischen zwei Endscheiben aus Kunststoff angeordnet ist, wobei die offene Endscheibe für eine andere Anschlußart ausgeführt ist. Die offene Endscheibe weist hier als Anschlußmittel einen im zentralen Durchgang liegenden Dichtring auf, so daß für diese Bauart eine gesonderte Spritzgießform erforderlich ist.Furthermore, DE 44 16 577 A1 is a similar one Filter insert known in which a star filter element is arranged between two plastic end plates, the open end plate for a different type of connection is executed. The open end plate points here as Connection means one lying in the central passage Sealing ring on, so that a separate for this type Injection mold is required.
Ferner ist es aus der DE-AS 1 461 451 bekannt, bei einem Filtereinsatz mit hohlzylindrisch ausgebildetem Filterelement die abdichtenden Endscheiben durch Vergießen von Kunststoff in einer Form herzustellen, so daß ein zusätzliches Aufschmelzen zum Einsumpfen des Papierelements entfällt. Hier ist die offene Endscheibe in eine Grundplatte aus Kunststoff eingegossen, die neben ihrem zentralen Gewindestutzen außenliegende Einlaßöffnungen aufweist und selbst ein Teil eines Filtergehäuses darstellt. Diese Grundplatte baut sehr aufwendig und eignet sich nicht für verschiedene Anschlußvariationen bei kostengünstiger Bauweise. Furthermore, it is known from DE-AS 1 461 451, in one Filter insert with a hollow cylindrical design Filter element the sealing end plates by casting of plastic in a mold so that a additional melting to soak the paper element eliminated. Here is the open end plate in a base plate cast in plastic next to its central Threaded connector has external inlet openings and itself forms part of a filter housing. This Base plate builds very complex and is not suitable for different connection variations at lower cost Construction.
DE 4222136 A1 zeigt einen Flüssigkeitsfilter mit einem Filterelement mit einem
doppelkonischen Stopfen 26. Der doppelkonische Stopfen 26 wird von einem Federelement
24 in einen im Deckel 13 des Gehäuses 11 vorgesehenen konischen Übergangsbereich 17
hineingedrückt.DE 4222136 A1 shows a liquid filter with a filter element with a
double
EP 0773052 A1 offenbart ein Ringfilterelement, in dem das Filterelement 11 dichtend
zwischen stirnseitigen Endscheiben 12, 13 aus Kunststoff angeordnet ist, wobei die eine
Endscheibe 12 geschlossen ausgebildet ist. EP 0773052 A1 discloses a ring filter element in which the
Der erfindungsgemäße Filtereinsatz mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß er bei gleicher Grundbauform eine größtmögliche Variantenvielfalt ermöglicht, wobei er zudem einfach und kostengünstig herstellbar ist. Die zusätzlichen Innenteile sind universell verwendbar, leicht herstellbar und günstig zu befestigen. Der Filtereinsatz läßt sich in energiesparender Weise herstellen, indem das Einsumpfen des Filterelements beim Gießen der Endscheiben aus Kunststoff vorgenommen wird, bevor der Kunststoff erstarrt und eine dichte und feste Verbindung herstellt. Der hohe Energieaufwand zum erneuten Aufschmelzen eines kraftstoffresistenten Kunststoffes kann damit entfallen.The filter insert according to the invention with the characteristic Features of claim 1 has the advantage that it is the largest possible with the same basic design Variety of variants allows, while also simple and is inexpensive to manufacture. The additional inner parts are universally applicable, easy to manufacture and inexpensive to fix. The filter insert can be in manufacture in an energy-saving manner by sinking the Filter element when casting the end plates from plastic is made before the plastic solidifies and a creates a tight and firm connection. The height Energy expenditure for re-melting one fuel-resistant plastic can thus be dispensed with.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind
vorteilhafte Weiterbildungen und Verbesserungen des im
Anspruch 1 angegebenen Filtereinsatzes möglich. Eine
besonders kostengünstige und widerstandsfähige Bauart des
Filtereinsatzes läßt sich erreichen, wenn er gemäß den
Ansprüchen 2 bis 8 ausgeführt wird. Vor allem läßt sich
dadurch eine leicht herstellbare, stabile und sichere
Verbindung zwischen dem Außenring und dem Innenteil
erreichen, die auch einem lang andauernden Betrieb bei
aggressiven Kraftstoffen standhält. Gemäß den
Ansprüchen 9 und 10 lassen sich für verschiedene
Anschlußarten mit möglichst geringem Aufwand
unterschiedliche Bauartvarianten erreichen. Besonders
günstig für eine einfache, kostengünstige und stabile
Verbindung ist es, wenn die offene Endscheibe gemäß dem
Anspruch 12 als Schweißverbindung ausgeführt wird.
Vorteilhaft ist ferner eine Ausführung nach Anspruch 13,
wobei an das in eine Spritzform eingelegte Innenteil der
Außenring angegossen wird, so daß eine feste und dichte
Verbindung entsteht.By the measures listed in the subclaims
advantageous developments and improvements in
Claim 1 specified filter insert possible. A
Particularly inexpensive and robust design of the
Filter insert can be achieved if it according to the
Claims 2 to 8 is executed. Above all,
thereby an easy to manufacture, stable and safe
Connection between the outer ring and the inner part
achieve that also a long-term operation
withstands aggressive fuels. According to the
Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Längsschnitt durch ein erstes Ausführungsbeispiel eines Filtereinsatzes für ein Kraftstoff-Filter und Figur 2 einen Längsschnitt durch einen Teil eines zweiten Ausführungsbeispiels.Two embodiments of the invention are in the Drawing shown and in the description below explained in more detail. 1 shows a longitudinal section through a first embodiment of a filter insert for a Fuel filter and Figure 2 shows a longitudinal section through a Part of a second embodiment.
Die Figur 1 zeigt einen Längsschnitt durch einen
Filtereinsatz 10 für ein Flüssigkeitsfilter in vereinfachter
Darstellung, wie es bei Kraftstoff-Filtern verwendet wird.
Der Filtereinsatz 10 hat ein hohlzylindrisch ausgebildetes
Filterelement 11, das aus einem sternförmig gefalteten
Filterpapier besteht und dessen zickzackförmig verlaufende
Ränder in stirnseitigen Endscheiben 12, 13 aus Kunststoff
dicht befestigt sind. Die untere Endscheibe 12 ist
geschlossen und als ebene, kreisrunde Platte ausgebildet,
während die obere Endscheibe 13 durch einen zentralen
Durchgang 14 offen ausgebildet ist. Das sternförmige
Filterelement 11 ist somit für eine radiale Durchströmung
vorgesehen, wobei dies in der Regel von innen nach außen
geschieht. Die sternförmig verlaufenden Ränder an den
Stirnseiten des Filterelements 11 sind in die aus Kunststoff
bestehenden Endscheiben 12, 13 eingegossen. Dies wird
dadurch realisiert, daß das flüssige Kunststoffmaterial in
eine Form eindosiert wird und in der Regel daran
anschließend das papierne Filterelement 11 in das noch nicht
erstarrte Material gedrückt wird. Nach dem Aushärten des
Kunststoffs wird eine dichte und feste Verbindung zwischen
Endscheiben 12, 13 und Filterelement 11 erreicht.1 shows a longitudinal section through a
Filter insert 10 for a liquid filter in a simplified
Representation of how it is used with fuel filters.
The
Wie die Figur 1 näher zeigt, ist die offene Endscheibe 13
zweiteilig aufgebaut und besteht aus einem mit dem
Filterelement 11 verbundenen Außenring 15 und einem
Innenteil 16, in dem neben dem zentralen Durchgang 14 die
Anschlußmittel 17 angeordnet sind, die hier als O-Ring 18
ausgebildet sind. Das Innenteil 16 ist im wesentlichen
rotationssymmetrisch ausgebildet und hat eine den
Durchgang 14 aufnehmende Nabe 19, an deren Außenumfang ein
sich radial erstreckender Ringflansch 21 einstückig
angeformt ist. Das Innenteil 16 ist mit einem in das Innere
des Filtereinsatzes 10 ragenden Nabenteil 22 in einer
Führungsbohrung 23 des Außenrings 15 zentriert. Der
Außendurchmesser des Ringflansches 21 ist wesentlich größer
als der Innendurchmesser der Führungsbohrung 23; ferner
weisen der Ringflansch 21 und der Außenring 15 jeweils einen
rechteckigen Querschnitt auf, deren lange Seiten
aneinanderliegen, so daß zwischen beiden eine relativ große,
überlappende Berührungsfläche 24 liegt. Diese
Berührungsfläche 24 ist nun als Schweißverbindung 25
ausgeführt, so daß der Außenring 15 mit dem Innenteil 16
dicht und fest verbunden ist. Die Schweißverbindung 25 ist
dabei vorteilhaft durch Ultraschallschweißen oder durch
Reibschweißen herstellbar. Das Innenteil 16 hat ferner ein
nach außen ragendes Nabenteil 26, an dessen Außenumfang in
einer Ringnut 27 der Dichtring 18 angeordnet ist.As FIG. 1 shows in more detail, the open end plate is 13
constructed in two parts and consists of one with the
Das Innenteil 16 ist einfach, stabil und kostengünstig
aufgebaut und kann aus dem gleichen Kunststoff hergestellt
werden wie der Außenring 15. Vorteilhaft läßt sich dafür ein
gegen Kraftstoff widerstandsfähiger Kunststoff, wie zum
Beispiel Polyamid, verwenden. Der Außenring 15 mit dem
Filterelement 11 und der geschlossenen Endscheibe 12, also
ohne das Innenteil 16, bilden zusammen ein Grundelement 28,
das als Ausgangsbasis für verschiedene Filtereinsätze
verwendbar ist. Bei der Herstellung des Filtereinsatzes 10
kann dabei so vorgegangen werden, daß zuerst das
Grundelement 28 aufgebaut wird und anschließend das
Innenteil 16 an den Außenring 15 angeschweißt wird. Der so
hergestellte Filtereinsatz 10 wird in ein nicht näher
gezeichnetes Filtergehäuse eingebaut, wobei der O-Ring 18 in
an sich bekannter Weise die Abdichtung zwischen der Schmutzund
der Reinseite im Inneren des Filtergehäuses übernimmt.The
Die Figur 2 zeigt einen Längsschnitt durch einen Teil eines
zweiten Filtereinsatzes 30, der sich vom ersten
Filtereinsatz 10 nach Figur 1 wie folgt unterscheidet, wobei
gleiche Bauelemente mit gleichen Bezugszeichen versehen
sind. Der zweite Filtereinsatz 30 weist ein gleiches
Grundelement 28 auf, an dessen offener Endscheibe 13 ein
anderes Innenteil 31 festgeschweißt ist. Beim Innenteil 31
ist in den zentralen Durchgang 14 eine Gewindemutter 32 aus
Metall eingesetzt, die hier als Anschlußmittel 17 dient. Das
Innenteil 31 läßt sich in gleicher Weise wie beim ersten
Filtereinsatz 10 durch Schweißen am Außenring 15 befestigen.
Der zweite Filtereinsatz 30 wird in an sich bekannter Weise
in ein nicht näher gezeichnetes Filtergehäuse eingebaut,
wobei in die Gewindemutter 32 eine Kraftstoffleitung
eingeschraubt werden kann. Auf diese Weise läßt sich ohne
Änderung des Grundelements 28 eine andere Anschlußbauart
verwirklichen, so daß mit geringstmöglichem Aufwand eine
größtmögliche Variationsvielfalt realisierbar ist.Figure 2 shows a longitudinal section through part of a
Selbstverständlich sind an den gezeigten
Ausführungsbeispielen Änderungen möglich, ohne vom Gedanken
der Erfindung abzuweichen. Anstelle der gezeigten Innenteile
mit den Anschlußmitteln in Form von Dichtring-Ringnut
beziehungsweise Gewindemutter für Schraubanschluß, lassen
sich auch anders aufgebaute Innenteile verwenden. Obwohl es
zweckmäßig ist, die beiden Teile der offenen Endscheibe aus
dem gleichen Kunststoff herzustellen und sie durch eine
Schweißverbindung fest und dicht miteinander zu befestigen,
kann es auch zweckmäßig sein, diese beiden Teile in der
Berührungsfläche 24 miteinander zu verkleben.Of course, are shown on the
Embodiments possible changes without thought
to deviate from the invention. Instead of the inner parts shown
with the connection means in the form of a ring seal
or threaded nut for screw connection
use other internal parts. Although it
is expedient, the two parts of the open end plate
manufacture the same plastic and use a
Secure the welded connection tightly and tightly together
it may also be useful to have these two parts in the
Bei der Herstellung des Filtereinsatzes 10, 30 kann es auch
zweckmäßig sein, die Innenteile aus thermoplastischem
Kunststoff herzustellen und in eine Spritzform einzulegen,
in die anschließend eine thermoplastische Schmelze für den
Außenring 15 frei extrudiert wird. Dabei wird das Innenteil
im Bereich der Berührungsfläche 24 von der extrudierten
Schmelze angeschmolzen. Ferner wird in diese Schmelze das
papierne Filterelement stirnseitig eingetaucht. Nach dem
Erstarren der Schmelze kann die offene Endscheibe 13 aus der
Spritzform ausgehoben werden, wobei das Filterelement
stirnseitig dicht verschlossen ist und die beiden Teile der
Endscheibe dicht und fest miteinander verbunden sind.In the manufacture of the filter insert 10, 30 it can also
be useful, the inner parts made of thermoplastic
Producing plastic and inserting it into an injection mold,
into which a thermoplastic melt for the
Claims (13)
- Filter insert for a liquid filter, in particular for fuel filters, having a substantially hollow-cylindrical filter element, in particular made from filter material which has been folded into a star shape, which filter element is arranged in a sealing manner between end-side end plates made from plastic and through which filter element the liquid which is to be filtered can flow in the radial direction with respect to the longitudinal axis of the filter insert, one end plate being of closed design, while the other end plate has a central passage and connection means for connection to a pressure-medium connection, the other end plate being of two-part structure and having an outer ring (15), which is connected to the filter element (11), and an inner part (16, 31), which includes the connection means (17, 18, 27, 32) and the passage (14), the inner part (16, 31) having a hub (19), which includes the passage (14), and an annular flange (21, 24), the connection means (17, 18, 27, 32) being provided on the hub (19), and the inner part (16, 31) being tightly and fixedly connected in a nonreleasable manner to the outer ring (15) via the annual flange (21, 24).
- Filter insert according to Claim 1, characterized in that the inner part (16, 31) substantially comprises plastic and has a contact surface (24) which radially overlaps the outer ring (15) and at which it is fixedly and tightly connected to the outer ring (15).
- Filter insert according to Claim 1 or 2, characterized in that the inner part (16, 31) has a radially extending annular flange (21) which forms the overlapping contact surface (24) which runs parallel to the outer ring (15) and is in particular of planar design.
- Filter insert according to Claim 3, characterized in that the inner part (16, 31) is designed as a rotary part and the radially running annular flange (21) is formed integrally on the outer circumference of the hub.
- Filter insert according to Claim 4, characterized in that the outer ring (15) has a guide opening (23), in which the inwardly projecting hub part (22) of the inner part (16, 31) is guided.
- Filter insert according to one of Claims 3 to 5, characterized in that the outer ring (15) and the annular flange (21) are each substantially rectangular in cross section, with their long sides butting against one another and forming the overlapping contact surface (24).
- Filter insert according to one of Claims 1 to 6, characterized in that the outer ring (15) and the inner part (16, 31) consist of the same plastic, in particular of polyamide.
- Filter insert according to one of Claims 3 to 7, characterized in that the external diameter of the annular flange (21) is significantly greater than the internal diameter of the guide opening (23).
- Filter insert according to one of Claims 1 to 8, characterized in that the inner part (16, 31), in particular at its outwardly projecting hub part (26), has an outer annular groove (27) for receiving a sealing ring (18).
- Filter insert according to one of Claims 1 to 8, characterized in that the inner part (31), in particular at its outwardly projecting hub part (26), has, in its passage (14), a threaded nut (32) which is made in particular from metal and is used for securing purposes.
- Filter insert according to one of Claims 1 to 10, characterized in that the filter element (11) is a star insert, the end-side edges of which are cast into the end plates (12, 13), which consist of plastic, during the casting of these plates.
- Filter insert according to one of Claims 1 to 11, characterized in that the outer ring (15) is moulded to the inner part (16, 31), in particular by ultrasonic or friction welding.
- Filter insert according to one of Clams 1 to 11, characterized in that the outer ring (15) made from plastic is cast onto the inner part (16, 31), which consists of thermoplastic material, after the inner part has been placed into a mould, the inner part being at least partially melted by the molten material at the contact surface (24), and in that the filter element (11) is pressed into the outer ring (15) before the liquid plastic solidifies.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19604371A DE19604371A1 (en) | 1996-02-07 | 1996-02-07 | Filter insert for a liquid filter |
| DE19604371 | 1996-02-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0788823A1 EP0788823A1 (en) | 1997-08-13 |
| EP0788823B1 true EP0788823B1 (en) | 2003-06-04 |
Family
ID=7784713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97101304A Expired - Lifetime EP0788823B1 (en) | 1996-02-07 | 1997-01-29 | Filtering insert for a liquid filter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0788823B1 (en) |
| DE (2) | DE19604371A1 (en) |
| ES (1) | ES2201213T3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10003993A1 (en) * | 2000-01-29 | 2001-08-23 | Bosch Gmbh Robert | Filter insert for a liquid filter |
| DE10010710A1 (en) | 2000-03-04 | 2001-09-06 | Mann & Hummel Filter | Filter element |
| DE102005008686B4 (en) * | 2005-02-25 | 2010-09-23 | Mann + Hummel Gmbh | Process for the preparation of fluid or air filters and filters made therewith |
| DE102013106264B4 (en) | 2013-06-17 | 2015-10-01 | Fsp Fluid Systems Partners Holding Ag | filter element |
| DE102016203766A1 (en) | 2016-03-08 | 2017-09-14 | Mahle International Gmbh | Fuel filter element |
| CN111068432A (en) * | 2020-01-10 | 2020-04-28 | 瑞安市海川自动化系统有限公司 | Machining process for gearbox filter |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4295525A (en) * | 1980-02-06 | 1981-10-20 | Baker International Corporation | Method and apparatus for quick replacement of cartridge filters used in well fluid cleaning operations |
| DE3514778C1 (en) | 1985-04-24 | 1986-08-14 | Knecht Filterwerke Gmbh, 7000 Stuttgart | Filter insert for a liquid filter |
| DE4416577C2 (en) | 1993-05-11 | 1998-07-09 | Hengst Walter Gmbh & Co Kg | Filter insert for a filter for filtering liquid or gaseous media |
| US5342519A (en) * | 1993-07-30 | 1994-08-30 | Donaldson Company, Inc. | Fluid filter cartridge with replaceable filter element |
-
1996
- 1996-02-07 DE DE19604371A patent/DE19604371A1/en not_active Ceased
-
1997
- 1997-01-29 ES ES97101304T patent/ES2201213T3/en not_active Expired - Lifetime
- 1997-01-29 EP EP97101304A patent/EP0788823B1/en not_active Expired - Lifetime
- 1997-01-29 DE DE59710189T patent/DE59710189D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59710189D1 (en) | 2003-07-10 |
| ES2201213T3 (en) | 2004-03-16 |
| EP0788823A1 (en) | 1997-08-13 |
| DE19604371A1 (en) | 1997-08-14 |
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